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METALWORKING EQUIPMENT
AND TOOLS
screws, flanges, glasses, rotors,
gears, etc.
Stream finishing of the
turbine blades was carried out
on the SF 3 machine using a
specially selected abrasive of
a certain shape and size (Fig.
9).
During the processing
time of 20 - 40 min, at a
container rotation speed of
30 - 40 min-1, it was possible a b
to obtain a roughness Ra 0.06 Fig. 6. The surface of the wear-resistant coating with drops (a)
... 0.08 μm without loss of and after their removal (b) on the machine of the DF series (increase x2000).
profile shape, which meets
the design and operational requirements of the blades. A feature of the processing is that in
order to achieve uniform processing, the process is carried out by changing the angle of rotation
of the blade in the abrasive in accordance with the design of the blade.
Using non-standard equipment, it is possible to process various bodies of revolution:
flanges, housings, bushings, discs, etc. (Fig. 10 and 11). In this case, intensive deburring and
smoothing of irregularities on the working surfaces occur.
In just 1 minute of wet processing on the SF 3 machine in a specially selected abrasive
medium at a rotation speed of the container of 50 min-1 and holder 4 min-1, all burrs were
removed, and in 4 minutes - to reduce the roughness Ra from 2.9 to 0, 45 microns;
Rp - from 7.6 to 1.5 μm, Rsk - from 1.33 to -2.87. In similar modes with the
clutch disc, the piston was machined.
In the manufacture of cutting tools, special attention is paid to
the condition of the cutting edges. For example, this is true for tools
that cut small thicknesses [3]. These tools include taps (Fig. 12, a).
a b For processing in large-scale production of high-speed steel

taps, an abrasive mixture of the HSC 1/300 grade was used, consisting
of granules of walnut shell and silicon carbide. Processing modes:
processing time - 1 minute; container rotation frequency - 60 - 70
min-1; spindle speed is - 2000 ... 2000 min -1 (PulsFinish technology).
As a result of processing the taps on the SF 3 PulsFinish machine for
1 minute, the following tasks were simultaneously solved: deburring,
smoothing the surface of the helical groove to Ra 0.08 μm, controlled
rounding of the main and auxiliary cutting edges to ρ = 9 ± 2 μm.
The absence of burrs (the absence of seizing) and the low
surface roughness (the absence of setting and running-in time) are
key requirements for the assembly and operation of gear units (Fig.
Fig. 7. Punch: a) after grinding;
b) after processing on the 13).
machine DF. In order to uniformly process the lateral surfaces of the teeth,
the treatment was carried out with the tilt of the holders at an angle
of 20 °. At the same time, sintered ceramic of the KXMA 16 brand was
used as an abrasive medium. The
processing time of one wheel did
before after not exceed 8 minutes. During
this period, deburring, rounding
of sharp edges and smoothing
of working surfaces in one cycle
takes place. Full automation
of the technological process of
processing eliminates operator
errors and increases the stability
a b of the results.

Fig. 8 Endoprosthesis without moving platform made of CoCr alloy:
a) after casting and traditional finishing; b) the mirror surface after
Finishing at DF PHARMA.

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